6. External types

Types defined by C++-bound sister modules — the imgui_node_editor core binding, dasImgui’s imgui / imgui_playwright — that dasImguiNodeEditor references but does not own. This page anchors their labels so the generated module pages link without dangling references; follow the upstream links for the authoritative definitions. (Daslang-core types such as json::JsonValue resolve against the daslang documentation via intersphinx.)

6.1. Node / pin / link ids

NodeId, PinId, and LinkId are int type aliases (defined on the boost v2 page). They are the editor’s opaque integer handles for graph entities — the app assigns them and the editor keys everything (geometry, selection, telemetry paths) off them.

6.2. imgui_node_editor::EditorContext

Opaque per-editor handle from imgui-node-editor (ax::NodeEditor::EditorContext). Created by create_node_editor(), destroyed by destroy_node_editor(ctx), and passed into every boost v2 entry point. intptr(ctx) is the stable handle that crosses the live / JSON boundary; handle_to_editor(handle) reinterprets it back.

6.3. imgui_node_editor::PinKind

Pin direction — Input or Output. Passed as the second argument to the pin macro; the editor uses it to decide which side of a node the pin sits on and which direction a link may flow.

6.4. imgui_node_editor::FlowDirection

Direction of a flow pulse along a link — Forward (source → target, the default) or Backward.

6.5. imgui_node_editor::StyleColor

The canvas color slots (Bg, Grid, NodeBg, NodeBorder, HovNodeBorder, SelNodeBorder, Flow, GroupBg, … plus Count) — 19 in total. Indexed by with_style_color and retokened wholesale by apply_daslang_node_editor_style.

6.6. imgui_node_editor::StyleVar

The canvas style scalars / vectors (NodePadding, NodeRounding, PinRounding, PinRadius, LinkStrength, PivotAlignment, PivotSize, FlowSpeed, GroupRounding, …). Pushed for a scope by with_style_var (float / float2 / float4 overloads matching the var’s arity).

6.7. imgui::ImDrawList

Dear ImGui’s per-window draw-command list, exposed by dasImgui’s imgui module. The group_hint and with_node_background_drawlist blocks hand it to the app for custom canvas painting (a node’s background draw channels only exist after its node block ends — hence with_node_background_drawlist runs post-block). See ImDrawList in imgui.h.

6.8. imgui_playwright::ImguiApp

The live-app handle from dasImgui’s imgui_playwright testing harness — the base URL, feature path, and transport for a running daslang-live instance. with_node_editor_app hands one to its block; ne_open wraps it in an EditorSession. See the dasImgui documentation.